know something when one sees it/one

idiom

Definition of know something when one sees it/one

: to be able to recognize or identify something immediately She knows a bargain when she sees it. I know a liar when I see one.

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“Know something when one sees it/one.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/know%20something%20when%20one%20sees%20it%2Fone. Accessed 12 Aug. 2020.

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